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STATES PATENT OFFICE.

W. BRYENT, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO DANIEL D. BADGER, OFNEW YORK, N. Y.

COMBINED RAILROAD-TRACK AND CAST-IRON PAVEMENT.

Specification of Letters Patent No. 20,620, dated June 22, 1858.

To all Iwhom it may concern.

Be it known that I, WALTER BRYENT, of Boston, in the county of Suffolkand State of Massachusetts, have invented a new Combined Cast-IronRailway and Pavement for Streets; and I do hereby declare that thefollowing is a full and exact description thereof, reference being hadto the accompanying drawings, making part of this specification, Figurel being a plan of a portion of the tracks and intervening pavement for adouble-track city-railway constructed in my improved manner; Fig. 2, atransverse vertical section of the same.

Like letters designate corresponding parts in both the figures.

I cast the track and intervening pavement in large sections, eachsection including the reticular pavement B, and the rails A, A, on bothsides thereof, and' forming one The width of each section, of course,depends on the gage of the railway; and the length may be such as to bemost convenient for casting and laying down, say nearly the same as thewidth. The form of the rail is not material, nor do I conne myself toany exact form of the pavement, although the reticular construction,with diagonal cells or meshes, substantially as represented in thedrawings, is preferred to any yet devised. In this, the intersections ff of the metallic web, rise in projections higher than the intermediateportions e, e, in the manner shown; so that the proper degree ofroughness is secured, to prevent the slipping of the horses, while thegeneral surface, when the pavement is embedded in gravel or cement, islevel, and offers but slight resistance to the passage of carriagewheels.

One end of each section of the track rails A, A, has a tenon a; and theother end is provided with a corresponding mortise 5,' so that when twoadjacent sections are placed together, the tenon of one rail iits intothe mortise of the contiguous rail, and thus strongly holds themtogether.

The pavement portions of the adjacent sections are interlocked by meansof tongues, or ledges, c, al, cast in the half cells or meshes of theiredges. The alternate tongues c, c, on each border, are near the bottomof the pavement, and the intermediate tongues d, d, are nearer the top;and they are so arranged that the tongues d, d, of one section, mayslide closely over the tongues c, c, of the adjacent section, andthereby firmly connect the sections. In this way, when the pavement andtracks are once firmly laid down, the whole compose one firm, immovablesurface.

Between the inner rails of a doubletrack railway, the space is, or maybe, covered with sections of pavement C, similar to the pavement B,which connects the rails. These sections may be simply embedded betweenthe tracks, or may be locked to the rails in any convenient manner.Other sections of pavement may be placed outside of the railway, tillthe whole street is paved in a similar manner.

What I claim as my invention and desire to secure by Letters Patent, is

l. The combination of a cast-iron pavement and railway, cast and unitedtogether in suitable sections, substantially as herein described.

2. I also claim the combination of the tenons a, a, mortises b, on theends of the rails, and the alternate over and under lapping tongues c,d, on the edges of the pavement, substantially as specified, for thepurpose of interlocking the adjacent sections of the combined pavementand railway.

WALTER BRYEN T.

W. H. L. SMITH.

